A group of students from Sand Creek High School in Colorado Springs recently returned from a trip to MIT where they showed off a filter made with crushed fired clay.
WSYX; Columbus Police Department
CNN; TWITTER/DOGAN_MMD; DHA
DHA; CNN; NBC/POOL; POOL; Council on Foreign Relations
KXLY; Twitter; Instagram
Unsourced picture from WOWK via CNN
KGMB; KHNL via CNN
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